Trilobita - Phacopida - Cheiruridae
Full reference: H. B. Whittington. 1954. Ordovician trilobites from Silliman's Fossil Mount. in A. K. Miller, W. Youngquist, and C. Collinson, Ordovician cephalopod fauna of Baffin Island, Geological Society of America Memoir 62:119-149
Parent taxon: Cheiruridae according to P. A. Jell and J. M. Adrain 2003
Sister taxa: Acanthoparyphinae, Actinopeltis, Anasobella, Areia, Areiaspis, Borealaspis, Ceraurinella, Ceraurinus, Cerauroides, Cerauromeros, Ceraurus, Cheirurinae, Cheirurus, Chiozoon, Contracheirurus, Crotalocephalina, Crotalocephalus, Cydonocephalus, Cyrtometopella, Cyrtometopus, Deiphon, Didrepanon, Eccoptochile, Gabriceraurus, Hadromeros, Heliomera, Heliomeroides, Hemisphaerocoryphe, Holia, Hyrokybe, Junggarella, Kawina, Ktenoura, Lehua, Nieszkowskia, Onycopyge, Osekaspis, Pandaspinapyga, Paraceraurus, Parayoungia, Parisoceraurus, Pateraspis, Placoparina, Proromma, Protocerauroides, Pseudocheirurus, Pseudosphaerexochus, Radiurus, Skelipyx, Sphaerexochus, Sphaerocoryphe, Sphaexerochinae, Stubblefieldia, Sycophantia, Valongia, Whittakerites, Xystocrania, Youngia
Subtaxa: Remipyga glabra
Type: Remipyga glabra
Ecology: fast-moving low-level epifaunal carnivore